尼龙6/碳纤维微复合材料的界面微观力学  

INTERFACIAL MICROMECHANICS OF PA6/CF MICRO-COMPOSITES

作　　者：严峡[1] 龙盛如[2] 杨杰[2,3] 

机构地区：[1]四川大学高分子科学与工程学院,成都610064 [2]四川大学材料科学技术研究所 [3]高分子材料工程国家重点实验室(四川大学),成都610065

出　　处：《高分子学报》2010年第6期684-690,共7页Acta Polymerica Sinica

基　　金：国家高技术研究发展计划(863项目,项目号2007AA03Z561)资助

摘　　要：选用微球脱黏实验,在其基础上改进了制样方法,并分析了界面参数对界面微观力学性能的影响.结果显示,树脂微球脱黏时的力值Fmax随着纤维在树脂基体中的包埋长度le增大而以斜率k的趋势线性增大,截距为b;界面剪切强度τIF与le呈双曲线函数关系,随着le增大而增大,并最终趋向于一个极限值k′.此外,还讨论了不同的界面参数,如函数Fmax(le)的斜率k,截距b值,对函数Fmax(le)和τIF(le)的曲线分布的影响,以及试样形貌对实验数据分散性的影响。Based on the microbond test,the method of sample preparation was improved,and its procedure was described in detail.The effect of interfacial parameters,such as the slope k（N /m） and intercept b（N） of the function Fmax（le）,k＇（N /m^2） and b＇（N /μm） of the function τIF（le）,on the micromechanics of microcomposites was discussed.The experimental results showed that typical maximal force（Fmax） demonstrated excellently linear relationship with embedded length（le） in range of 55 and 75 μm when the stretching rate was 4 mm /min.However,the interfacial shear strength（τIF） showed hyperbolic relationship with the le,and eventually tended to a limited value（k＇） along with increase of le.At the same time,the interfacial parameters,slope k（from 0.0033 to 0.0095 N /m） and intercept b（from-0.54 to-0.14 N）,were discussed respectively to reveal how these parameters affected the dispersion of theoretical curves.The bigger the value of k was,the faster the typical maximal force（Fmax） and the theoretical curve of the interfacial shear strength（τIF） increased.Meanwhile,the bigger the value of b was,the bigger the value of typical maximal force（Fmax） and interfacial shear strength（τIF） were.Finally,the effect of specimen geometry on the dispersion of experimental data was also discussed.The defects of different specimens actually caused stress concentration in the interface,which increased the dispersion of experimental curves.

关 键 词：微球脱粘实验法 微观力学 界面 微复合材料 

分 类 号：TB332[一般工业技术—材料科学与工程]